allen



(No Model.) 2 Sheets-Sheet 1.

J. F. ALLEN.

GAS SGRUBBEIL.

No. 389,785. Patented Sept. '18, 1888.

WITNESSES: l/Vl/E1V7'0l? Io'lm/L'E FLU. mm-

W hi4 ATTORNEYS 7 N. FEIERS. mmumm nu, wmin mm 04c.

' (No Model.)

. 2 Sheets-Sheet 2. J. P. ALLEN.

hisATTOfi/VEYS.

UNITED STATES PATENT OFFICE.

JOHN F. ALLEN, OF NEW YORK, N. Y.

GAS-SCRUBBLER.

SPECIFICATION forming part of Letters Patent No. 389,785, datedSeptember 18, 1888.

' Application filed December 31, 1887. Serial No. 250,499. (No model.)

To all whom it may concern.-

Beit known that I, JOHN FRANKLIN ALLEN, a citizen of the UnitedStates,residing at New York, in the county and State of New York, have inventednew and useful Improvements in Gas-Scrubbers, of which the following isa Specification. My invention relates to the means employed for treatinggas, whereby the ammonia and other objectionable products are removed bybringing the gas into intimate contact with water or otherpurifying-liquid.

The object of my invention is to provide, in a simple and economicalform, the maximum of available wet surfaces within agas-ehamber of anygiven capacity. I secure this object by coiling upon itself, at rightangles to the plane of the drum or shaft which supports it, a long stripof sheet metal of suitable width, having both of its edges turned up soas to act as a continuous trough, which, when rotated, will cause liquidentering the outer convolution of its coil to pass between each layer,andthrough its own gravity be retained at the lowest point of theseveral layers until discharged in a central drum carried by thehorizontal shaft which gives motion to and supports thecoil. By thismeans the entire surface of the metal will be continuously wet andexposed to the action of the gas. I secure a uniform space between theseveral convolutions of the strip by the use of an intermediate platehaving projections on both of its sides, so as to present points of restor support for the sheets of metal between which it is placed.

These projections are preferably formed by indenting the plate from bothsides. The indentations and the projections in this plate, as well asthe plate itself, afford additional wet surfaces for the absorption ofimpurities from the gas in its passage through the coil. The coil iskept in position by an outer rim of metal of suitable thickness, whichacts as an inclosing-band. This band or rim is supported on radial armsextending from the shaft or drum on either side of the coil. Any numberof coils maybe placed upon the shaft and inelosed within a cylinder orcasing having openings for the admission and discharge of gas andliquid. The drum, which forms the initial point of attachment for thecoil, is provided with suitable openings for the admission and 1discharge of the liquid lifted to the center by the rotation of thecoil. \Vithin the cylinder, and at the base of each coil, is a shallowreceptacle or compartment for holding the liquid. Beneath saidreceptacles or compartments are pockets for receiving the deposits oftar or similar matter discharged from the gas. Suitable means forreducing the temperature of any one or all of the compartments orreceptacles for the liquid are provided, all of which is more fullypointed out in the following specification and claims, and illustratedin the accompanying drawings, in which- Figure 1 represents alongitudinal section in the plane 00 m, Fig. 2, of a gas-scrubbercontaining my invention. Fig. 2 is a transverse section thereof in theplane y y, Fig. 1. Fig. 3'is a cross-section of the inclosing-band anddrum. Fig. 4 is a face view of Fig. 3. Fig.5 is a sectional elevation ofa modified form of drum and coil. Fig. 6 is a perspective view ofaportion of the intermediate or supporting sheet. Fig. 7 is aperspective view of the trough-shaped sheet.

Similar letters indicate corresponding parts. In the drawings, theletter A designates a cylinder or casing having a suitable opening, D,at one end for the admission of the gas to be purified, and an opening,F, at the opposite end for the discharge of the gas. The liquid isintroduced through a funnel, 7, at one end of the cylinder, and makesits exit through a U shaped tube, 8, at the opposite end thereof. In thecenter of the drum is a shaft, C, carrying a driving-pulley, E, exteriortothe cylinder A, and a number of drums, L, in the interior of the same.

B B, &c., are a series of coils through which the gas passes. The innerend of each of said coils is secured to its respective drum L. Each coilconsists of a spirally-wound troughshaped sheet of metal having flaringcorrugated sides 2, which is held in place by a rim or inclosing band,4, Figs. 1, 3, and 5. The rim is secured to the drum by radial arms K K,Figs. 3 and 4; or it may be secured by like means to the shaft 0. Anysuitable number of such coils may be arranged in the cylinder or casing,all being constructed in the same manner.

